Prompt to leave the page

Tips for leaving the page

When recording articles and questions and answers , Data loss is always caused by accidentally closing the page tag , All the articles written hard are lost , Heart tired ~

Add js Code

<!-- Ask if you want to leave the page -->
<script>
	window.onbeforeunload = function (event) {
    
		event.preventDefault();
	}
</script>

When closing the tag, you will be asked whether to leave , Prevent data loss caused by late closing of labels .

Interface prompt text

Firefox " This page wants to ask if you want to leave  -  The data you enter may not be saved "
Safari " Are you sure you want to leave this page ？"
Chrome " Reload this site ？”“ The system may not save your changes ."

Different browsers will have different interface prompt text , Make sure you don't lose data when writing questions and answers , very nice~

window.onbeforeunload Invalid

stay Chrome and Firefox in , After the page loads , If the user does not operate on the page , such as “ Click on ”、“ Input ” wait ,onbeforeunload Will not be carried out .

And in the Safari in onbeforeunload It will always be executed .

It's important to point out that , Many browsers will ignore this event and automatically close the page without user confirmation .

My learning forum

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The article links :http://huangjunjie.vip:66/question/read/582q3u645tzq7q73yq